Program to demonstrate how to check if a character is a whitespace or not in Java
package com.hubberspot.example;
public class IsWhiteSpaceTest {
public static void main(String[] args) {
// Create a String of character having letters, digits
// spaces and symbols in between just for a test
String characters = "Q 1 w 2 E 5 y $ % a - ^ ";
// we take the length of characters by length()
int length = characters.length();
// we than loop each character one by one
for(int i = 0; i < length; i++) {
// we store each character in a variable
// for each loop
char character = characters.charAt(i);
// checking for each character that its a whitespace character
// or not by calling Character class isWhitespace() method ,
// by passing the character. It returns true if the character
// passed is whitespace character or not
if(Character.isWhitespace(character)) {
System.out.println("Given character : '" + characters.charAt(i)
+ "' is a whitespace character");
}
else {
System.out.println("Given character : '" + characters.charAt(i)
+ "' is not a whitespace character");
}
}
}
}
Output of the program : 
